/Engine/Source/Runtime/Engine/Public/SaveGameSystem.h
Internal async helpers that require implementation. NB. OutResult will be null for async calls
[UE::Tasks::FTask](API\Runtime\Core\Tasks\FTask) InternalDoesSaveGameExistAsync ( const TCHAR * Name, [FPlatformUserId](API\Runtime\Core\Misc\FPlatformUserId) PlatformUserId, [FSaveGameAsyncExistsCallback](API\Runtime\Engine\ISaveGameSystem\FSaveGameAsyncExistsCallback) Callback, [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [ESaveExistsResult](API\Runtime\Engine\ISaveGameSystem\ESaveExistsResult) > OutResult )